The branch main has been updated by kib:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=0b3948e73b749b0fefc3f9d4fc61f356542bb9b9

commit 0b3948e73b749b0fefc3f9d4fc61f356542bb9b9
Author:     Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2021-03-06 09:52:10 +0000
Commit:     Konstantin Belousov <k...@freebsd.org>
CommitDate: 2021-03-12 11:31:08 +0000

    softdep_unmount: assert that no dandling dependencies are left
    
    Reviewed by:    mckusick
    Tested by:      pho
    Sponsored by:   The FreeBSD Foundation
    MFC after:      2 weeks
    Differential revision:  https://reviews.freebsd.org/D29178
---
 sys/ufs/ffs/ffs_softdep.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/ufs/ffs/ffs_softdep.c b/sys/ufs/ffs/ffs_softdep.c
index cd00181b3c21..0091b5dcd3b8 100644
--- a/sys/ufs/ffs/ffs_softdep.c
+++ b/sys/ufs/ffs/ffs_softdep.c
@@ -2825,6 +2825,13 @@ softdep_unmount(mp)
        FREE_GBLLOCK(&lk);
        ump->um_softdep = NULL;
 
+       KASSERT(ums->sd_on_journal == 0,
+           ("ump %p ums %p on_journal %d", ump, ums, ums->sd_on_journal));
+       KASSERT(ums->sd_on_worklist == 0,
+           ("ump %p ums %p on_worklist %d", ump, ums, ums->sd_on_worklist));
+       KASSERT(ums->sd_deps == 0,
+           ("ump %p ums %p deps %d", ump, ums, ums->sd_deps));
+
        /*
         * Free up our resources.
         */
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